1 | Ground or water surface | - | SFC | 2 | Cloud base level | - | CBL | 100 | Isobaric level | hPa | P%4.4i | 102 | Mean sea level | - | MSL | 103 | Height level above MSL | m | %3.3iGPML | 105 | Height above ground | m | %3.3iM | 105 | Height level above ground | m | %3.3iM | 112 | Layer between two depths below surface | cm | SUBSURFACE_%3.3i_%3.3i | 200 | Entire atmosphere | - | ATM |